Evaporating apparatus



O. CARR.

EVAPORATING APPARATUS.

APPLICATION FILED SEPT. I2I 1916.

1,405,75 Patented Feb. 7,1922,

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EVAPORA'IDN'G APPARATUS.

' Be it known that I, OMA CARR, a. citizen of the United States of America, and a resident of New York, county of New York, State of New York, have invented certain new and'useful Improvements in Evaporating Apparatus, of which the following is a full and clear specification. I

In evaporating waterfrom liquids by atomizing the liquid into a body of heated gas, usually air, it is essential that the atomized particles, or spheres, of liquid be uniformly mixed with the gas which is to Inasmuch as 970 B. T. U. are required for the evaporation of one pound of water from air at 212 Fahr. (inthe form of evaporator here considered) it is necessary that the pound of water shall be uniformly mixed with whatever volume of ga may contain the 97 0 B. T. U., in order that the heat required may be communicated to the water and effect its evaporation. Particularly is this the case where it is desired to evaporate a liquid containing solids (in solution or suspension) with the view I ofsecuring the solids in dry condition, as,

. in this case, a deficiency of heat communiwhich evaporate too slowly.

- heatingv air, or other gas, to mingle while travelling in practically the'same direction cated to one part of the spray will cause incomplete dryness of the particles at that point, and a whole product imperfect as'to dryness.

' Furthermore, I have found in practice that verygreat importance attaches to the manner in'which the mixture of spray and air or other gas is accomplished,-particularly where large capacitiessay, .8' to 10 tons per -hour of liquid through a single atomizer'areinvolved. Thus, where theatomt izer throws its spray at a relatively wide angle-say, 40 to it is not possible-to cut acrossthe spray with a blast beneath the spray, as, in such case, there is caused merging of the minute spheres into large drops The best results are secured by causing thespray and and at approximately the same velocity.

. To accomplish these results, both being vital to economic evaporation when evaporating to dryness,- I employ. the princip e illustrated in the accompanying drawing which illustrates a vertical sectional view of an apparatus embodying one formof my invention. Referring theretoby reference Specification of Letters Patent.

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characters, the liquid is atomized through atomizer a of any suitable construction into a spray-rectifier or trimmer b, which is-contained within an air-distributor 0.' Such spray as escapes from the end b of the Patented Feb. '7, 1922.

Application filed September. 12, 1910. "Serial 110. 119,745. 1

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spray-rectifier is caught by the air blast 1ssuing from the end 0 of air distributor 0,, such air being derived from duct (1.

Through deflectors e on air-distributor c, the air currents aretlirned inwards towards rectifier, thus enclosing thecloud ofspray issuing from the spray-rectifier and causing complete mixture of air "and spray, both moving in approximately the same velocity and direction. a

the longitudinal center line of the .spray- In the tubular spray-rectifier, gcircu'lar rings f may placed, serving to eliminate the spray which is travelling at wide angle to the longitudinal center line of the sprayrectifier, the liquid so trapped out being returned through a pipe" 9 to storage or an It is found 'n practice that the-sprayi-air mixture passing away from the air-distributor begins to diffuse some distance therefrom, such diffusion dependin upon volume ofair, velocity of air, size 0 chainber, and resistance to eflluence'. If the chamber into which the air-spray. mixture is being driven has a small vertical section, it

is desirable to cause theair-spray mixture to diffuse more rapidly inlateral directions.

than vertically; and this may be -accom plished by placing a horizontal air current. beneath-or at one side of the mixture issuing from the air-distributor, as illustrated by duct 71.. The effect may be intensified by placing movable, lips h on the duct,

such lips serving to lift the air. from duct 71. into the mixture, causing the latter. to

interval, i. e., the time required for the moisture to escape from the atomized diffuse more rapidly laterally than verti- For some solutions, the drying particle, is such that, unless the "distance from the floor k to the longitudinal center 'line of spray-air mixture is considerable, diffusion may beso rapid that floor or oeil- -ing," or both, may be brushed by incompletely dried particles; in such case, causing more rapid. lateral diffusion will cause longer suspension and permit completion of drying floor or ceiling.

It is obvious that the spray-rectifier need not. be cylindrical, but may be square, rectangular, or even polygonal, in'cross-section;

and the air distributor may be separate from the spray-rectifier and derive 1ts air or other gas from a source different fromduct (1. The essential features are that the spray and heating air or other gas shall v the an currents from the air-distributor;

ditions.

be brought together While moving in approximately the same direction and velocity, and mixture accomplished under such .con- The spray-rectifier may be arranged internally in any desired manner to accomplish the purpose of delivering the spray in approximately parallel lines with under the conditions stated.

Having thus described my invention, what I claim is: t

1. In a gas-evaporator, the combination and then causing mixture of spray and air of an atomizer, a spray rectifier associated therewith to trim the spray, and an air distributer associated with the spray rectifier, said rectifier consisting of a ring-like member surrounding the spray-stream and inclining away from the stream in the direction of its movement to thereby remove the caught. particles, of liquid away from .the stream.

2. In a gas evaporator, the combination of an atomizer, a spray rectifier associated therewith arranged to surround the spray and trim the same, and an air distributer associated with the rectifier, said rectifier embodying a ring-like member surrounding fore the particles touch the the spray-stream and extending laterally away from the stream .to thereby remove the trimmed particles away from the stream.

3. In a gas-evaporator, the combination of a drying chamber, an atomizer arranged to deliver an atomized spray thereinto, means for supplying a drying gas, and a spray-rectifying means consisting of a chamber surrounding the atomized spray adjacent the nozzle and embodying a trimming member extending around the spray adapted to catch the wide-angled particles and convey-them away from the spray-stream and deposit them in said latter chamber.

4. In a gas-evaporator, the combination of a drying chamber, an atomizer arranged to deliver an atomized spray thereinto,

the spray-stream and adapted to remove the wide-angled particles from such stream, a trap-chamber to receive the collected wideangled particles from the trimmer, and means for conveying the trapped liquid back to the source,

In testimony whereof I hereunto aflix signature.

' OMA CARR. 

